Test Description

WARNING: This page is about a different car, the 1995 Oldsmobile Ninety-Eight and 1995 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Test numbers refer to numbers on diagnostic chart.

This step verifies integrity of sensor circuits.
This step verifies integrity of circuit between ICM and PCM.
Voltage reading will be zero if camshaft gear magnet is interfacing with camshaft position sensor.
If voltage reading of cam signal circuit is constantly varying and connection to PCM is good, PCM is faulty.

Fig 1: Code P0342 Schematic (3.8L) Cam Signal Circuit

Fig 2: Code P0342 Diagnostic Flow Chart (3.8L) Cam Signal Circuit